/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using ASC.Xmpp.Core.protocol;
using ASC.Xmpp.Server.Storage;
using ASC.Xmpp.Server.Storage.Interface;
using System;
using System.Collections.Generic;

namespace ASC.Xmpp.Server.Users
{
	public class UserManager
	{
		private StorageManager storageManager;

		private IUserStore userStore;

		private IUserStore UserStore
		{
			get
			{
				if (userStore == null)
				{
					lock (this)
					{
						if (userStore == null) userStore = storageManager.UserStorage;
					}
				}
				return userStore;
			}
		}

		public UserManager(StorageManager storageManager)
		{
			if (storageManager == null) throw new ArgumentNullException("storageManager");
			this.storageManager = storageManager;
		}

		public bool IsUserExists(Jid jid)
		{
			return GetUser(jid) != null;
		}

		public User GetUser(Jid jid)
		{
			return UserStore.GetUser(jid);
		}

		public ICollection<User> GetUsers(string domain)
		{
			return UserStore.GetUsers(domain);
		}

		public void SaveUser(User user)
		{
			UserStore.SaveUser(user);
		}

		public void RemoveUser(Jid jid)
		{
			UserStore.RemoveUser(jid);
		}
	}
}